<!DOCTYPE html>
<html>
<head>
	<title></title>
	<style type="text/css">
	body{
		background-color: #696969;
	}
		input{
			width: 100px;
			height: 100px;
			font-size: 20px;
			line-height: 100px;
			border:1px solid white;
			margin:20px auto;
			display: block;
			background-color: #696969;
		}
		.box1{
			width: 170px;
			border-radius:20px;
			color: white;  
		}
		.box1:hover{
			text-shadow: 0 0 50px white;
			box-shadow: 0 0 20px green;
		}
	</style>
</head>
<body>
<input type="button" value="button" class="box1">
</body>
</html>